James Propp
James Propp studies tilings, games, and other aspects of combinatorics, probability, and dynamical systems. Many of his articles are available for download in PostScript and gzipped PostScript formats. Code for C programs related to tilings and cellular
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Jim Loy's Puzzle Page - Jim Loy
This is a group of number, geometry, and logic puzzles with solutions, including "The Missing Dollar," "The Monty Hall Trap," and comments on the Tower of Hanoi.
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John MacFarlane
Papers, books, talks, courses, and other resources by the member of the University of California, Berkeley's Group in Logic and the Methodology of Science and a co-organizer of the Working Group in the History and Philosophy of Logic, Mathematics, and
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Joseph Mazur
Books by the professor emeritus of mathematics at Marlboro College: Enlightening Symbols: A Short History of Mathematical Notation and its Hidden Powers; Euclid in the Rainforest: Discovering Universal Truth in Mathematics; The Motion Paradox: The 2,500-Year
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Journal Homepages - Kluwer Academic Publishers
A search page for finding journals published by Kluwer Academic Publishers. Each includes past, present, and future article listings, aims and scope, and submission and subscription information. Search the complete catalogue by keyword or view journals
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Labyrinth - Peter Kishalov
An online puzzle: choose the correct door to advance through the labyrinth, based on logic puzzles similar to those published by Raymond Smullyan in his book The Lady or the Tiger?.
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Lammas - Peter Fox
A simple game of logic using a number of differently coloured tiles arranged in a grid. The object is to convert the complete grid to tiles of a single colour. The rule for conversion is given by the four tiles at the top left corner as a template. A
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Lateral Puzzles - Paul Sloane
Pose or solve lateral thinking puzzles, also known as situation puzzles, which depict a counterintuitive scenario to be explained by asking yes-no questions or by proposing explanations. Read question-and-answer conversations of current and solved puzzles;
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Laws of Form - Richard Shoup
Inspired by the book Laws of Form by George Spencer-Brown, in which the author built a "calculus of distinctions." Read an interpretation of his laws of calling and crossing as a logical arithmetic; see a simple analysis of Spencer-Brown's Counter; learn
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Laws of Thought - Keith Devlin (Devlin's Angle)
"What Zeno of Citium actually did was found the Stoic school of logic. Though modern mathematical logic is popularly credited as having its beginnings in the syllogistic logic of Aristotle, most of the fundamental notions of contemporary propositional
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Learning to Reason - Nancy Rodgers, Hanover College
"When we reason within a logical framework, words must be manipulated according to the rules of the game...." Learn about the terms "not," "and," "or," "implies," "is equivalent to," "for all," and "for some"; logical reasoning and expressing it in writing;
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The Limits of Mathematics - Ivars Peterson (MathTrek)
In Godel's realm, no matter what the system of axioms or rules is, there will always be some assertion that can be neither proved nor invalidated within the system. Indeed, mathematics is full of conjectures assertions awaiting proof with no assurance
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LiveSudoku - LiveSudoku.com
Play Sudoku free online at four different levels: beginners, medium, hard, and "wicked." The JavaScript game's options include pencil markings, highlighting, and solution checking. LiveSudoku.com also offers tutorials, tracks player performances on current
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Locker Problem - Suzanne Alejandre
A classroom activity (also called 1000 Lockers) aligned to the NCTM and California Standards, to be explored through the use of manipulatives and a ClarisWorks spreadsheet. Students then look for patterns and write the answer algebraically. The problem:
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Logical Laws - Alex Sakharov
This page contains a collection of logical laws of the first-order logic. The collection is based on Kleene's collection (from his books 'Introduction to Metamathematics' and 'Mathematical Logic') and contains a few additions. The laws holding in classical
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The Logic Puzzle Museum
Play with more than fifty different hands-on brain twisters, mechanical and logic puzzles -- and craft your own. Regular events at this Burlington, Wisconsin, museum include Valentine's Day (make-your-own historic rebus valentines), celebrations of the
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Logic Puzzles - Erich's Puzzle Palace; Erich Friedman
Five logic puzzles: "Tweedledum and Tweedledee look alike, but Tweedledum lies on Monday, Tuesday, and Wednesday, whereas Tweedledee lies on Thursday, Friday, and Saturday. They both tell the truth on Sunday. You come upon the two of them, and they make
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Logic (SMILE) - M. Elaine Granger, Irvin C. Mollison
A lesson for grades 6-8 designed to use pattern puzzles to teach students to understand word problems by use of reasoning techniques; identify the validity or non-validity of the problems; discern which factors are needed for problem resolution; and use
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